Holding and clamping device



Dec. 11, 1928.

A. A. LAINER HOLDING AND CLAMPING DEVICE Filed June 20, l927 PatentedDec. 11,1928.

UNITED 5.;

ABRAHAM A. LAINER, OF WORCESTER, MASSACHUSETTS.

HOLDING AND CLAMPING DEVICE.

Application filed June 20,

The invention relates to means for holding the cylinders of centrifugalmachines, While the blades thereof are being removed. Certain types ofcentrifugal machines, used for 6 the removal of dirt and sediment fromgasoline and other cleaning fluids, provide a cylinder inside of whichare a plurality of blades fitting with a tight fit. These blades orwings, as they are sometimes called, have to be re moved quitefrequently, often several times a day, in order that the interior of thecylinder may be cleaned. The operationof removal is a dangerous one, dueto the fact that the blades have very sharp edges and have a 16 tendencyto stick in the cylinder. Heretofore the cylinders have been placed on abench in a sort of anvil, which prevents them from turning provided theoperator holds them down on the anvilythe operator must then hold thecylinder in question from moving longitudinally and pull out the bladeswith a hook. This operation is dangerous because the operator has tohold the cylinder as well as draw the blades.

By the use of my invention, the cylinders are firmly clamped on thebench, and the operator can devote his entire attention to drawing theblades, and keep his hands away from them as he uses the hook. He doesnot have to steady the cylinders'at all. My invention comprises aclamping device and means to exert considerable pressure on thecylinders so that they cannot move. It contemplates also the use oflugs, preferably de- 85 tachable, that fit into the slots provided inthe sides of the cylinders. Thelugs willwear out fastest, and by makingthem detachable, they alone will have to be replaced.

The above and other advantageous features of the invention willhereinafter more fully appear in the following detailed description,taken in connection with the accompanying drawings, in which Fig. 1 is afront elevation of a holding and clamping device made in accordance withthe invention.

Fig. 2 is a side elevation.

Fig. 3 is a plan view.

Fig. f is a view similar to Fig. 1, but showing the clamp opened.

Fig. 5 is a fragmentary View of the device, illustrating the operationof closing the locking device.

Fig 6 is a plan view with the clamp opened,

in order to show the detachable lugs.

Fig. 7 is a sectional View on the line 77 1927. Seria1No .200,153.

of Fig. 1, showing a cylinder clamped infposit-ion, this figure being ona reduced scale.

Like reference characters refer to likeparts throughoutthe drawings.

Referring particularly to Figs. 1,2, and

4, the device comprises a base or supporting The cylinders for which thedevice of the invention is made weigh considerable, I

and are most conveniently placed in the portion 4 of the base 1 bysliding them in; the depression 5 provides a double support for thecylinder as it is slid into the portion f as on an inclined plane, andprevents binding.

As aforesaid, the cylinders all rovide slots 'inthe walls thereof, saidslots eing spaced n nety degrees apart, and therefore, in order that thecylinders may be clamped in position without possibility of turning,lugs 6,6 are provided by the base 1. Referring to Figs. 1, 4 and 6,these lugs are separate members and consequently detachable they fit inslots 7 7 provided in the surface of the portion l and are held in placeby cotter pins'8, 8 through extensions 9, 9 of the lugs, the lugstogether with their extensions'having the shape of a T as shown in 6.The GXlJOilSIOIlS 9, 9 pass into slots 10, 1

cut in the sides of the base 1; the primary purpose of these slots 10,10 is for the pivotal attachment of the clamping member 12 at one sideof the base, and the similar attachment of the locking device at theother side. To that end the clamping member 12 provides a slabbed offportion 13 which fits with in the walls of the right hand slot 10. A pinor rivet 14; passes through the walls of the slot and through theportion 13, thus providing a pivotal mounting for the clamping member,which is held from side play by reason of the fact that the portion 18fits closely in the slot.

The clamping member 12 provides a curved surface 15 which, together withthe cut out portion 4, constitutes a completely circular holding means,when the clamp 12 is closed. The clamping member preferably provides alug 16, spaced ninety degrees from the lugs 6, 6; however this lug,although it fulfills the same, purpose as the other lugs, and fits intoa spaced slot in the side of the cylinder that is to be held, need notbe removable, as the lugs 6, 6 will suflice to hold the cylinder at allevents, even if the lug 16 wears out.

At the left hand side thereof, the'clamping member is slotted. This slot17 (see Fig. 2) has the same width as the left hand slot 10 in the base1, and a member 18, which is pivotally held in the slot 10 by means of apin or rivet 19, is adapted to be swung upwardly into the slot 17.Pivotally attached to the member 18, which is in effect a link, is alever 20. The lever 20 provides a forked portion 21 (see Fig. 3) whichreceives the link 18 and is pivotally attached thereto by means of a pin22. The bottom of the forked portion 21 constitutes a cam surface 23.The parts are shown in open position in Fig. 4, and in closed positionin Fig. 1, the portion of greatest eccentricity 24 of the cam surfacebeing shown in engagement with the surface 25 of the clamping memberthat extends over the base 1; in this posit-ion of the lever 20 theclamp is securely locked down when a cylinder is in position.

Assuming that the device is open as shown in Fig. 4, and that it isdesired to clamp a cylinder firmly in place, the cylinder will be placedin the cut out portion 1 and rotated until the lugs 6, 6 enter the slotsprovided in the cylinder. The clamping member 12 can then be swungdownwardly into place, and

the lug 16 will enter another slot in the cylinder by reason of theninety degree spacing of both the slots and the lugs. The device is madeso that when the cylinder is clamped in position, there will be no playallowed; consequently some force must be used to fasten the clamp down.This is taken care of by my novel lever locking device. As shown in Fig.5, the lever 20 together with the link 18 should be swung clockwiseuntil the central portion of the cam surface 23 engages the corner ofthe portion 25, as well illustrated in the said figure. Thereupon,clockwise rotation of the lever 20 will have two eifeots;-it will exerta. powerful commove in a counterclockwise direction, and

the device is then in a locked position.

I claim:

1. In. a device of the class described, a base providing a substantiallysemi-circular cut out portion, lugs provided by said portion for thenon-rotatable holding of a cylinder,

a complementary clamping member pivotally attached to said base, a linkpivotally connected to said base opposite the pivotal attachment of saidclamping member, and a cam lever pivotally attached to said link,whereby to lock said clamping member firmly in place on said base andhold a cylinder from any movement.

2. In a device of the class described,a base providing a substantiallysemi-circular cut out portion, a complementary clamping member pivotallyattached to said base, a link pivotally connected to said base oppositethe pivotal attachment of said clamping member, a cam lever pivotallyattached to said link, whereby to lock said clamping member firmly inplace and hold a cylinder from lon gitudinal movement, and detachablelugs located in the said out out portion, whereby to hold said cylinderfrom rotation when it is clamped in position, and whereby said lugs can.be readily replaced when worn.

3. In a device of the class described, a

base providing a substantially semi-circular cut out portion, lugsprovided by said portion for the non-rotatable holding of a cylinder, acomplementary clamping member pivotally attached to said base, means forlocking the clamping member to the base to hold a cylinder, and therebeing a depression in said base whereby a cylinder may he slid upwardlyinto place without binding.

ABRAHAM A. LAINER.

